Printing.



O. W. HOWELL, JR.

PRINTING. APPLICATION FILED MAY- 25, 1911.

Patented Mar. 2, 1915 msmw.

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To" all whom it may concern:

Be it known that 1, CHARLES WESLEY HOWELL, Jr., a citizen of the, United States, residing at Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Printing, of which the, following is a specification, reference beinghad'therein to the accompanying drawing.

My invention relates to improvementsin printing and has particular reference to the printing done on a writing machine such as a typewritelir One of the principal objects of my invention is to produce printing which" cannot be changed, altered, or erased without detection and to this end I prefer to employ pin; pointed type. I also prefer to use a specially prepared base or back for this work and'have found that the best results are obtained by using a yielding and non-elastic material such as wax mixed with suitable inthe roller of the machine. Fig. 2 is a front view of a piece of pin pointed type such as I prefer to use, and Fig. 3 is a side view looking from right to left at Fig. 2.

My inventibn is particularly adapted for use in making out checks owing to the fact that checks are pften raised in amount after they have been issued. For this purpose it is best to select a typewriter which is provided with pin pointed type although other kinds of type may be used. When type other than pin pointed type is used, the lines of the letters made by the type are not perforated, and it is by means of the perforations made by the pin pointed type that alteration, erasure or changing of the printing is madepractically impossible without detection. It is also preferable to use a machine such as the Sun typewriter in which the type is inked by an inking roller mechanism instead of by an inking ribbon. It would require very heavy striking to force the points of pin pointed type through an inking ribbon and then only the points would print,

I whereas by using a ribbonless machine or a machine having an inking roller mechanism an entire outline of each letter is printed Specification (ii-Letters Patent.

Application filed. Ha es, 1911. Serial No. 629,381.

. forationc retested Mar. 2, 159115.

over the perforations. The best results have been obtained by mixin lithographers ink or" other suitable indelib e coloring material with the wax but the mixture should retain as near as possible the same consistency as wax and it should be prepared iI1 heets.'

In carrying out my invention according to my preferred method of procedure 1' introduce into a ribbonless typewriter with pin polnted type, the blank form ofa check, such as 4, and a blank piece of paper of the same size, such as 5, for a duplicate record (which may be double faced) with the in;

delible coloring matter, such as (3,," During,

the printing operation the points 7 of the type should pass entirely through the check. and the wax and should be in length about 1 equal to the thickness of the check and the wax so that the outline of the letter 8- of the type from which the points project are printed upon the face of the check between the perforations made by the points. The

printing on the check isalso reproduced in dotted outline by the points of the type upon the blank piece of paper intended for the dulicate record. The slight heat generated y the impact of the type is suihcient to melt small portions of the colored wax which wipe ofi" the points as the type leaves the v paper and deposit on the inside of the perof the check where they penetrate and satu. check a (1 become thoroughly hardened. The bac of the check will of course disclose ate the fibers of the paper of the.

a negati e of the indelibly stained perforated printing, and thehardened wax m the fibers extending within the perforations of the check will be found to be practically acid proof and sufficiently inaccessible to be mixeei and formed in sheets than when transjeetionahie to'the bases, A suificieni; (was tncy of wax Ior the type. to strike againss, however, enables the fpomis to ravel the mo essary depth to allow fiche lines of the type to print between the perforations in the check. If the. war: sheeeis not suiiicientiy ihiek or if ibis omis'teci; only ihe points of the type fat iii print so that the printing will be in deified outline,

It has been foundiha; the Wax and color-.

ing materiai'holoi better in the perforations when the and. coiormg material are for paper aiml a Wax sheet are used. Very good resultshare been obtained by forming Wax and'incieiihle pigment into sheets approximately five or six times the thickness of ordinary carbon paper.

Of eourse io will be understood that other modifications can he made withoui departsheets to be printed by means of pin poisified type and through said transfer sheetupon "the other oi. said sheets substantially as oleserihed.

2. The method of printing with penetrating type consisting in backing the sheet io be printed with a colored yielding andl non-elastic body, said backing and shee; of an aggregate thickness about equabto the iength of the penetrating portions of? saicl i; e.

3 The method of printing With penetrating type consisting in separating the sheets to be printed by a sheet of colored yielding 4 and non-elastic material, one of said sheet:

and. said material of an aggregate thick about equal to the length of the penetrating portion of said type.

In testimony whereof I aflix mysignature in presence of two Witnesses.

Wiinesses:

LOUISE EF'DERLE, ii'noims .i. Hm. 

